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Lab · Sector Dispersion

Breadth vs the sector.

Most screens show the sector's price. These show what its members are doing underneath — is the move broad, or carried by a few mega-caps? Median constituent vs the index, advancers vs decliners, how many names beat the index, and a cumulative advance/decline line that tends to turn before price. 40 ETFs & index cuts · closes through 2026-09-14.

What changed below the surface · 21-day

Where the constituents' advance/decline is pulling away from the ETF's price — the early read, before the headline reflects it.

Improving — breadth rising under flat/soft price

none today

Weakening — breadth falling under firm price

Closelook indices

RUBIN 125/126 · 99% wt
Rubin Build-Out 100 (EW)
-5.25% med -1.11pp 9 / 115
HALO 99/100 · 99% wt
HALO Growth 100 (EW)
-0.05% med +0.23pp 55 / 44
AEI 34/34
Agentic Ecosystem Index (EW)
+4.25% med -1.08pp 22 / 12
EUROAI 61/65 · 94% wt
Euro-AI Sovereign 50 (EW)
-2.61% med +0.05pp 23 / 38
AW40 38/40 · 95% wt
Agentic Winners 40 (EW)
+4.04% med -0.18pp 33 / 5

S&P 500 sectors

XLK 72/72
Technology Select Sector
-1.81% med -0.66pp 28 / 44
XLF 76/76
Financial Select Sector
-0.38% med +0.78pp 47 / 29
XLV 59/59
Health Care Select Sector
+1.45% med -0.20pp 52 / 6
XLE 21/21
Energy Select Sector
-0.94% med +0.01pp 7 / 14
XLI 80/80
Industrial Select Sector
-1.42% med +1.43pp 40 / 40
XLP 36/36
Consumer Staples Select Sector
+1.25% med -0.27pp 31 / 5
XLY 48/48
Consumer Discretionary Select Sector
-0.10% med +0.78pp 31 / 17
XLU 31/31
Utilities Select Sector
-1.34% med +0.52pp 5 / 26
XLB 26/26
Materials Select Sector
-0.90% med +0.38pp 5 / 21
XLRE 31/31
Real Estate Select Sector
-0.69% med +0.84pp 18 / 13
XLC 23/23
Communication Services Select Sector
+2.19% med +0.35pp 19 / 3

Nasdaq-100 cuts

QTEC 45/45
First Trust Nasdaq-100 Technology
-0.71% med +0.95pp 23 / 22
QQXT 56/56
First Trust Nasdaq-100 Ex-Technology
+0.32% med +0.00pp 35 / 20
QQEW 49/49
First Trust Nasdaq-100 Equal Weight
+0.14% med +1.70pp 36 / 12
QTOP 31/31
iShares Nasdaq-100 Top 30
-0.89% med +0.50pp 15 / 16

Tech & thematics

IGV 110/110
iShares Expanded Tech-Software
+5.04% med -0.86pp 90 / 18
SMH 25/25
VanEck Semiconductor
-4.75% med -0.83pp 0 / 25
XSD 43/43
SPDR S&P Semiconductor (EW)
-6.12% med +0.22pp 1 / 41
AIQ 66/66
Global X AI & Technology
-0.80% med +2.03pp 39 / 27
CIBR 41/41
First Trust Nasdaq Cybersecurity
+5.99% med -1.89pp 34 / 7
DTCR 20/20
Global X Data Center & Digital Infra
-3.68% med -0.03pp 0 / 20
WTAI 47/48 · 77% wt
WisdomTree AI & Innovation
-4.26% med +4.26pp 23 / 23
QTUM 62/63 · 76% wt
Defiance Quantum
-3.13% med -0.17pp 19 / 40
ARKK 42/42
ARK Innovation
+1.36% med +0.54pp 30 / 12

Global

IXN 87/124 · 81% wt
iShares Global Tech
-2.46% med +0.90pp 36 / 51

Computed across the constituents we cover in our data lake (coverage shown per card). A/D line = cumulative daily advancers minus decliners. Decision-support, not investment advice.

FAQ · from the current data · as of 2026-09-14

Quick answers

What does this dispersion tool measure?

For each ETF or index it compares the median constituent return to the ETF/benchmark return, counts advancers versus decliners, and tracks a cumulative advance/decline line that tends to lead price — showing whether a move is broad-based or carried by a handful of mega-caps.

How many ETFs and index cuts are tracked, and as of when?

40 ETFs and index cuts across five groups — Closelook indices, S&P 500 sectors, Nasdaq-100 cuts, tech & thematics, and global — with closes through 2026-09-14.

Which sector shows the widest breadth divergence today?

As of 2026-09-14, WTAI (WisdomTree AI & Innovation) shows the widest gap between its median constituent and the ETF itself: median +4.26pp versus the ETF's -4.26%, with 23 advancers against 23 decliners.

Which sectors are improving or weakening on a 21-day view?

As of 2026-09-14, 0 ETFs show improving breadth (advance/decline rising under flat or soft price), and 7 show weakening breadth (advance/decline falling under firm price), led by ARKK.

How is the advance/decline line computed?

It is the cumulative daily count of constituent advancers minus decliners, computed across the constituents held in the Closelook data lake — coverage is shown per ETF card.